Fluid motor



Dec. 19, M. A. BRODERlCK FLUID MOTOR Original Filed Dec. lO, 1931 2 Sheets-Sheet l l vm MMO.

l @ma 19, M A BRQDERlCK FLUID MOTOR Original Filed Dec. l0. 1931 2 Sheets-Sheet 2 25 jij/1. Skoda-bzf- @www www.

Patented Dec. Y19, 1933 FLUID Moron Martin A. Broderick, Johnstown, Pa., assig'nor of one-half to Nunzio Giancola,Johnstown, Pa..

Application December 10, 1931, serial No. 530,162

' Renewed October 2, 1933 'l 4 Claims. (Cl. 253-136) The invention aims to provide an exceptionally simple and inexpensive, yet an eilicient and reliable fluid motor which is of such construction that it may be manufactured and assembled with 5I ease, and .may be disassembled with equal ease whenever required.

Another aim is to make novel provision to prevent any water, or other motive liquid from .reaching the rotor shaft bearings.

With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description being accomplished by reference tothe accompanying drawings.

'isi Fig. 1 is a vertical longitudinal sectional View through a motor constructed in accordance with the invention.

Fig. 2 is a vertical transverse sectional View on line 2 2 of Fig. 1.

."Ho Fig. 3 is a perspective view of the lower unitary casing section.

Fig. 4 is a perspective view of the upper unitary casing section.

Fig. 5 is a perspective view of one of the bear- '95 ingfcaps.

A preferred construction has been shown and will be specifically described, with the understanding however that within the scope of the invention as claimed, minor Variations maybe $0 made.

The casing of the motor is formed of a lower unitary section L and anv upper unitary section U having features of `construction co-operating in forming a chamber for the rotor R, bearings T for the rotor shaft, and conduits for conducting the fluid which drives said rotor.

The lower section L is in the form of a onepiece casting suitably machined wherevernecessary. This casing section embodies a flat horizontal top plate 10 and a lower rotor cup` 11 which is under and integral withsaid top plate, said cup opening upwardly through said plate. At opposite sides of the rotor cup 11, are afluid inlet conduit 12 ,and a fluid outlet conduit 13,

A5 said conduits being preferably alined, being under the top plate 10, andbeing integral with said top plate 10 and said rotor cup 11. The inlet conduit 12 does not open directly into the cup v 11, but the discharge end of this conduit opens upwardly at 14 through the top plate 10. The

outlet conduit 13 however opens at.15 into the cup 11.

Two horizontal channel-shaped arms 16 project horizontally in opposite directions from the cup 11 and are disposed at right angles to the axis of the conduits 12 and 13, said arms being under the top 'plate 10 and being integral with vthis 'top plate and` with the cup 11. The arms 16 contain upwardly open bearing cups 17 which are integral therewith', said cups opening through o0 the top plate 10 and being spaced outwardly from the rotor cup 11, the intervening spaces being denoted at 18. The upper edges of the cups 17 and the upper edge of the rotor cup 11, are formed with alined shaft-receiving notches 19 and 20 as respectively, and at the outer side of one of the cups 17, the plate 10 is provided with a depressed portion 21 alined with said notches. Semi-cylindrical bosses 22 are formed on the exterior of the cup ll'in concentric relation with the notches, 7. and form portions of stuffing boxes, as Ywill hereinafter appear.

The upper casing section U embodies a flat .horizontal bottom plate23 which is fluid-tightly secured by cap screws or the like 24, upon the top plate 10 of the lower section L. Over and integral with this top plate 23, is an upper rotor cup `25 .which co-acts with the cup 11 in forming a complete chamber for the rotor R. Also over and integral with the plate 23, is a fluid-conducting conduit 26 whose receiving end is open at 27 through said plate 23, and here communicates with the open end 14 of the fluid inlet conduit 12. The conduit`26 extends over and is integral with the upper rotor cup 25, and ter 8S minates in a nozzle-forming portion 28 which discharges intothe vinterior of said cup 25. The lower edge ofcup- 25 is provided with semicircular notches' 29 registering with the notches 20, and with semi-cylindrical bosses 30 co-acting 60 with vthe bosses 22 in forming stuffing boxes to contain appropriate packing 31, threaded rings 32 being provided for tightening the packing when required. The rings 32 are located in the spaces 18 and may be entirely unthreaded from 95 the stuffing boxes allowing repacking of the latter. The rotor R is provided with suitably shaped blades 33 which are acted upon by the fluid discharged from the nozzle 28, so that said rotor israpidly driven, the fluid being then discharged through the conduit 13. The shaft of the rotor is denoted at 34 and said shaft is received in the notches 19, 20, 21 and 29, and passes through the stulng boxes above described, This shaft is provided with two bearing enlargements 35 which rest in the bearing cups 17 and are held in the latter by additional downwardly opening cups 36 forming portions of bearing caps 37 which are bolted or otherwise secured upon the no plate 10 of the lower section L. The cups 36 carry appropriate lubricators 38, and the bearing enlargements 35 are provided with sockets 39 which receive the lubricant from said lubricators and carry it around so that the bearings will be effectively lubricated.

Any of the water or other driving fluid which may leak from the stuffing boxes, is received in the channel-shaped arms 16 and may be drained from the latter from time to time, through appropriate petcocks 40, and whenever upon opening of these cocks, an appreciable amount of liquid discharges, it is known that the stuffing boxes require tightening or repacking, so that these matters can be given prompt attention and hence the liquid cannot rise suiiiciently to enter the bearing cups 17..

The motor may be used for various purposes and power may be transmitted from it in any desired way. For illustrative purposes, a pulley 41 is shown upon one end of the shaft 34.

It will be seen from the above that a motor has been provided which may be easily and inexpensively manufactured, may be sold at a reasonable price, and will be very eflicient and desirable. Very little water or other driving uid is carried around by the rotor and hence, little resistance is set up to the rotation of the latter. Moreover, the bearing constructions upon which thisk rotor is mounted, are such as to reduce friction to the minimum.

As excellent results may be obtained from the details disclosed, they may well be followed. However, attention is invited to the fact that within the scope of the invention as claimed, variations may be made.

1. In a fluid motor, a lower unitary casing section embodying an upwardly Vopen rotor cup, a. fluid inlet conduit and a uid outlet conduit at opposite sides of said rotor cup, the delivery end of said inlet conduit being upwardly open at the top of said lower casing sectionand the receiving end of said outlet conduit being in communication with said rotor cup, and two horizontal arms projecting in `opposite directions from said rotor cup and having upwardly open bearing cups; an upper unitary casing section4 secured fluid-tightly upon said lower section and ernbodying a downwardly open rotor cup co-acting with said upwardly open rotor cup in forming a rotor chamber, afluid-'conducting conduit extendingV over said downwardly open cup from said upwardly open end of said inlet conduit, and a nozzle from said fluid-conducting conduit into said downwardly open cup; and bearing caps secured upon said arms and having downwardly open bearing` cups co-acting with the aforesaid'bearing cups in forming rotor shaft bearings. f

2. In a fluid motor, a lower unitary casing section havinga dat horizontal top plate, a'rotor cup under, integral with and opening through said top plate, horizontal fluid inlet and outlet conduits under said top plate at opposite sides of said cup and integral with said top plate and cup, the delivery end of said inlet conduit opening upwardly through said top plate and the receiving end of said outlet conduit being in communication with said rotor cup, and two channel-shaped arms under said top plate, projecting in opposite directions from said rotor cup and integral with said top plate and cup, said arms having bearing cups opening through said top plate; an upper unitary casing section having a. flat horizontal bottom plate fluid-tightly secured upon said top plate, an upper rotor cup upon, integral with and opening downwardly through said bottom plate, the two rotor cups being in communication, a fluid-conducting conduit upon and integral with said bottom plate and said upper rotor cup, said fluid-conducting conduit having an inlet end which opens through said bottom plate and communicates with said upwardly open end of said inlet conduit, and having a nozzle discharging into said upper rotor cup; and bearing caps removably secured upon said top plate and having'bearing cups co-acting with the aforesaid bearing cups in forming rotor shaft bearings.

3. In a fluid motor, a spherical rotor and a shaft therefor, the periphery of said rotor being provided with pockets all of constant uniform size to receive an impelling uid, each of said pockets having opposed side walls spaced inwardly from the points at which said shaft projects from the rotor, thereby leaving the portions of said spherical rotor between said walls and said points intact to act as both radial and end thrust bearing surfaces, and a casing having a sphericalv recess receiving said spherical rotor, the wall of said spherical recess and the surface of said spherical rotor being in running contact, said casing having fluid admission and discharge passages for communication with said pockets and having bearings for said shaft.

4. In a fluid motor, a single shaft provided with three spherical bodies iixedly secured thereto, one of said bodies being a centrally disposed body and being relatively large, and the other two bodies being spaced uniformly from said central body, said relatively largespherical body being provided with peripheral pockets all of constant uniform size to receive an impelling fluid, each 25 of said pockets having opposed side walls spaced inwardly from the points at which said shaft projects from said central body, thereby leaving the portions of said central body between said walls and said points intact to act as both radial and end thrust bearing surfaces, and a casing having three spherical recesses receiving said three spherical bodies respectively, and in running contact therewith, each of said spherical recesses and the contained spherical body acting l35 to resist both radial and end thrusts, said casing having fluid admission and discharge passages for communication with said pockets.

i MARTIN A. BRODERICK. 

